TABLE 5–1.

Possible Endocrine Factors in Growth of Human Female Mammary Glands

Clinical State	Growth Characteristics	Maturational Hormones
Prenatal	Rudimentary	None
Infancy	Rudimentary	None
Puberty	Growth and budding of milk ducts	Growth hormone, prolactin-estrogen, corticosteroids, prolactin (high doses)
Pregnancy	Growth of acinar lobules and alveoli	Estrogen, progesterone, prolactin, growth hormone, corticosteroids
Parturition	Alveolar growth	Prolactin, corticosteroids
Lactational growth of tissue	None	None
Secretory products	Casein, α-lactalbumin	Prolactin, insulin, corticosteroids